Consolidates AD2's diagnosis + independent Grok/Gemini review into an implementation spec for the 5 fixes (RTD label, DSCA Final-Test rebuild, retest supersede rule, encoded-serial importer decode, 379 backfill) with per-fix validation gates and a cross-cutting re-publication discipline. Drives the AD2-side implementation. Ref ticket #32441. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>